Feedback-amplified electrochemical dual-plate boron-doped diamond microtrench detector for flow injection analysis

Grace E M Lewis, Andrew J. Gross, Barbara Kasprzyk-Hordern, Anneke T. Lubben, Frank Marken

OAI: oai:purehost.bath.ac.uk:publications/e3553be1-3aed-4ac5-ac1f-c73ded13644b • DOI: https://doi.org/10.1002/elps.201500017

An electrochemical flow cell with a boron-doped diamond dual-plate microtrench electrode has been developed and demonstrated for hydroquinone flow injection electroanalysis in phosphate buffer pH 7. Using the electrochemical generator-collector feedback detector improves the sensitivity by one order of magnitude (when compared to a single working electrode detector). The diffusion process is switched from an analyte consuming "external" process to an analyte regenerating "internal" process with benefits in selectivity and sensitivity.

Boron-doped diamond Chromatography Feedback amplification Oxygen Quinine Separation